1: Age concerns dictate Biden's decision-making. Harris emerges as 2024 hopeful.

2: Biden's age raises questions. Harris positioned for 2024 run.

3: 2024 prospects shift as age concerns affect Biden. Harris steps up.

4: Harris eyes 2024 presidency amid Biden's age concerns.

5: Age weighs on Biden as Harris takes the spotlight for 2024.

6: Biden's age concerns pave the way for Harris in 2024.

7: Harris emerges as top contender for 2024 due to Biden's age.

8: 2024 hopefuls adjust strategy as age impacts Biden. Harris rises.

9: Age concerns shape Biden's future, making Harris a 2024 frontrunner.